A) 30
B) 40
C) 10
D) 20
सही उत्तर: A
$ N _2+3H _2\to 2NH _3 $ मोल = 20 मोल $ 2\times molesH _2=3\times molesNH _3 $
$ 2\times x=3\times 20 $ x = 30 मोल
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